All the way to the video signal corresponds to a monitor or video recorder. If you want to send the images of one camera to multiple managers, you have better choose the video distributor. Because the attenuation of the parallel video signal is large, the impedance of the parallel video signal is not matched, the image is seriously distorted, and the line is unstable. In addition to impedance matching, the video distributor also has video gain so that video signals can be sent to multiple output devices at the same time without being affected.